I need some hair advice O.o?

Ok i need some advice on my hair real bad. this has been going on for a while. every time i go to wash my hair i guess you can say it feels really hard. lol idk how else to explain this its as if brittle and it feels super dry. then it clumps together into hard knots and its hard to get rid of them but the worst part is all the hair i lose when i try to get rid of the knots in the shower (which is why my shower drain is always clogged) and i know you are suppossed to lose hair but not as much as i do. i dont know if i have the water to hot or im using the wrong shampoo. right now im using vital care world wide sulfate free deep reconstructing shampoo and the conditioner. but before that i was using the wen. (i actually didnt buy it my friend had some leftover bottles of it) maybe thats why my hair has been so dry but idk. this might also be of some helpful information. i am hispanic since everybody has different hair types and my hair is naturally curly. so if you have some hair care advice please help D: gracias